Ugh, not thanks. I still rage just thinking about God of War 2's ending QTE against Zeus. Or MW3 end, where the only interactive really part is where you run after the chopper and press jump. After that it's nothing but "enjoying" an action movie finale where you at times have to unpause the action.
Only QTE finishing move I'd want is one where you get to freely wail on the fucker how ever you like. Like after shooting them silly, you run up to them, put a boot in their face, and when they're down, you can use different buttons to kick and punch them as much as you like, and finish it all of with a bullet to the head, which you can fire any time you want.
That's what you really need. In an action movie, when the protagonist gets pushed around by the antagonist, you may feel like "Yeah, JB, kick his ass!" But in a game YOU are the protagonist and wathing someone else steal YOUR kill, YOUR revenge, is just insulting, no matter how well directed.